Novel Numerical Methods for Complicated and Violent Flows

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Ocean Engineering".

Deadline for manuscript submissions: closed (30 May 2023) | Viewed by 29490

Special Issue Editors

Director of Computational Marine Hydrodynamics Lab (CMHL), Shanghai Jiao Tong University, Shanghai 200240, China
Interests: computational fluid dynamics (CFD); computational marine hydrodynamics (CMH); fluid–structure interaction (FSI); wave loads; ship performance; floating hydrodynamics; offshore renewable energy
Special Issues, Collections and Topics in MDPI journals
Department of Naval Architecture, Ocean & Marine Engineering, University of Strathclyde, Glasgow G4 0LZ, UK
Interests: marine renewable energy; modelling of fluid-structure-interaction for wave energy converter; bio-inspired tidal energy device and offshore floating wind turbine
Special Issues, Collections and Topics in MDPI journals
Key Laboratory of Ship and Ocean Hydrodynamics of Hubei Province, School of Naval Architecture & Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
Interests: rudders; container ship; hydrodynamics

Special Issue Information

Dear Colleagues, 

Over the past several years, many novel numerical methods, such as overset grid techniques, adaptive refined mesh methods, Cartesian grid methods, meshless particle methods, high-order-spectral methods, as well as Lattice Boltzmann methods, have been developed to deal with the complicated and violent flows around marine structures, such as surface ships, submarines, offshore wind turbines, and floating platforms. All such complicated and violent flows are one of the most difficult topics in marine engineering because of the large span of spatial and temporal scales involved. A correct understanding and application of hydrodynamics on marine vehicles and structures are vital in their design and operation. The purpose of the invited Special Issue is to publish the most exciting research with respect to the above subjects and to provide a rapid turnaround time regarding reviewing and publishing, and to disseminate the articles freely for research, teaching, and reference purposes. 

High-quality papers are encouraged for publication, directly related to various aspects, as mentioned below. Novel numerical methods for the study are encouraged. 

  • Marine vehicle resistance;
  • Propulsion and controllability;
  • Wave loads, wave induced motions;
  • Energy and ecology considerations;
  • Green water of ship motion in waves;
  • Self-propulsion of ship motion;
  • LNG tank sloshing;
  • Wave run-up and impact loads on a floating platform with a mooring system;
  • VIV for risers and VIM for a deep-sea platform;
  • Wake flows of offshore floating wind turbines;
  • Slamming, water entry/exit of bodies.

Prof. Dr. Decheng Wan
Prof. Dr. Qing Xiao
Dr. Zhiguo Zhang
Guest Editors

Manuscript Submission Information

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Keywords

  • computational marine hydrodynamics
  • ship flows
  • floating hydrodynamics
  • coupled aero–hydro dynamic flows
  • fluid–structure interaction
  • violent flows
  • turbulent flows
  • overset grid techniques
  • adaptive refined mesh method
  • cartesian grid method
  • meshless particle method
  • lattice Boltzmann method

Published Papers (13 papers)

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Research

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26 pages, 11689 KiB  
Article
Numerical Study on the Waterjet–Hull Interaction of a Free-Running Catamaran
by Yanlin Zou, Dakui Feng, Weihua Deng, Jun Yang and Hang Zhang
J. Mar. Sci. Eng. 2023, 11(4), 864; https://doi.org/10.3390/jmse11040864 - 19 Apr 2023
Viewed by 1176
Abstract
Waterjet–hull interaction is the hot point and research focus in the research of waterjet-propelled crafts. This paper presents numerical studies on the interaction between a waterjet system and a catamaran. Numerical simulations of both bare hull and self-propulsion hull were carried out based [...] Read more.
Waterjet–hull interaction is the hot point and research focus in the research of waterjet-propelled crafts. This paper presents numerical studies on the interaction between a waterjet system and a catamaran. Numerical simulations of both bare hull and self-propulsion hull were carried out based on the URANS method. The SST k-ω model is selected for the closure of the URANS equations. The level set method together with the dynamic overset grid approach is used for the simulations. The body force model with the PI speed controller is used to simulate the rotational motion of the rotor in the simulations for the self-propulsion hull. Moreover, uncertainty analyses of the numerical method are conducted to verify the accuracy of the numerical solver. The numerical results of the bare hull and self-propulsion hull are compared in detail, such as the wave pattern, pressure distribution, hull attitude, and so on. The waterjet reduces the pressure on the hull surface near the stern and makes the height of the wave near the stern lower. This leads to a more violent change in hull attitude and the thrust deduction is positive, ranging from 0.1 to 0.2. The energy conversion is analyzed based on the ITTC recommended procedures, which shows the overall efficiency of the waterjet behind the hull is about 0.75~0.8 times the free stream efficiency. Full article
(This article belongs to the Special Issue Novel Numerical Methods for Complicated and Violent Flows)
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15 pages, 8272 KiB  
Article
Numerical Generation of Solitary Wave and Its Propagation Characteristics in a Step-Type Flume
by Xuemin Song, Jianxi Yao, Weiqin Liu, Yaqing Shu and Feng Xu
J. Mar. Sci. Eng. 2023, 11(1), 35; https://doi.org/10.3390/jmse11010035 - 27 Dec 2022
Viewed by 1175
Abstract
This work concerns the numerical generation of stable solitary waves by using a piston-type wave maker and the propagation characteristics of a solitary wave in a step-type flume. The numerical generation of solitary waves was performed by solving N-S (Navier–Stokes) equations on the [...] Read more.
This work concerns the numerical generation of stable solitary waves by using a piston-type wave maker and the propagation characteristics of a solitary wave in a step-type flume. The numerical generation of solitary waves was performed by solving N-S (Navier–Stokes) equations on the open source CFD (computational fluid dynamics) platform OpenFOAM. To this end, a new module of dynamic boundary conditions was programmed and can be applied to prescribe the horizontal linear motion of a paddle. Two kinds of paddle motions, based on both the first-order and ninth-order solutions of solitary waves, were first determined. The time history of paddle motion was restored in a file, which was then used as an input for the virtual wave maker. The solitary wave in water with a constant depth was generated by both numerical simulation and experiment in the wave flume installed with a piston wave maker. The results show that the amplitudes of trailing waves based on the first-order solution are larger than those based on the ninth-order solution and that wave height based on the first-order solution decays more quickly. The numerical wave profiles are in good agreement with the experimental ones. The propagation characteristics of a solitary wave in a step-type flume was numerically investigated as well. It was found that a part of the solitary wave is reflected when the solitary wave passes the step due to blockage effects, and the forward main wave collapses quickly when it enters shallow water. This work presents a very successful numerical study of stable solitary wave generation and reveals the phenomena when a solitary wave propagates in a step-type flume. Full article
(This article belongs to the Special Issue Novel Numerical Methods for Complicated and Violent Flows)
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17 pages, 6568 KiB  
Article
The Numerical Simulation of a Submarine Based on a Dynamic Mesh Method
by Guanghua He, Cheng Zhang, Hongfei Xie and Shuang Liu
J. Mar. Sci. Eng. 2022, 10(10), 1417; https://doi.org/10.3390/jmse10101417 - 03 Oct 2022
Cited by 1 | Viewed by 1603
Abstract
In this paper, a new numerical model is proposed by combining the overset mesh technique and dynamic mesh method in order to simulate the straight navigation and steady turning motion of a submarine model. The RNG k-ε turbulence model is applied [...] Read more.
In this paper, a new numerical model is proposed by combining the overset mesh technique and dynamic mesh method in order to simulate the straight navigation and steady turning motion of a submarine model. The RNG k-ε turbulence model is applied to close the three-dimensional Reynolds-averaged Navier–Stokes equations. The comparison between the numerical results and experimental data for the straight navigation experiment shows that the values of the total resistance and surface pressure coefficients of the proposed numerical model under different forward speeds are highly consistent with the experimental data of the David Taylor Research Center (DTRC). The proposed model is applied to simulate the forces and pressure coefficient of the SUBOFF submarine model at different velocities and rotation rates. The wake waves of the submarine under the conditions of the same rotation rate but with different velocities at the buoyancy center are presented. The results show that the pressure coefficient between the port side and starboard side differs according to the turning motions. The influences of the velocity and rotation rate on the forces and pressure coefficient are discussed. It will be demonstrated that the new numerical model maintains a high mesh quality by avoiding mesh deformation, and this leads to the higher numerical accuracy of the steady turning motions. Full article
(This article belongs to the Special Issue Novel Numerical Methods for Complicated and Violent Flows)
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17 pages, 10925 KiB  
Article
Numerical Investigation of Internal Solitary Wave Forces on a Moving Submarine
by Guanghua He, Hongfei Xie, Zhigang Zhang and Shuang Liu
J. Mar. Sci. Eng. 2022, 10(8), 1020; https://doi.org/10.3390/jmse10081020 - 26 Jul 2022
Cited by 4 | Viewed by 1658
Abstract
A numerical model is developed to investigate the hydrodynamic characteristics of a moving submarine induced by internal solitary waves (ISWs) in continuously stratified fluids. A new numerical scheme for the generation of ISWs with a current is proposed, in which the forward speed [...] Read more.
A numerical model is developed to investigate the hydrodynamic characteristics of a moving submarine induced by internal solitary waves (ISWs) in continuously stratified fluids. A new numerical scheme for the generation of ISWs with a current is proposed, in which the forward speed of the submarine is equivalent to the current. The superposition of the velocity field obtained from extended Korteweg-de Vires (eKdV) theory and the velocity field of the current is taken as the initial velocity field in a numerical wave tank. Convergence analysis is conducted, while the present numerical model is validated by comparing it with experimental data. Then, the interaction between the moving submarine and the ISWs against different pycnocline thicknesses and different moving speeds is investigated. The proposed numerical model can produce accurate ISWs coupled with a current. It can be found that the hydrodynamic forces on the submarine decrease with the increment of pycnocline thickness. The moving speed of the submarine performs a significant effect on the horizontal force, but a light effect on the vertical forces and the torque. It is also found that the forces on the moving submarine cannot be considered as the linear superposition of the navigation resistance in still water and the forces induced by ISWs. Full article
(This article belongs to the Special Issue Novel Numerical Methods for Complicated and Violent Flows)
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20 pages, 9158 KiB  
Article
Tip Clearance Effect on The Tip Leakage Vortex Evolution and Wake Instability of a Ducted Propeller
by Xidi Zhang, Zhihua Liu, Liushuai Cao and Decheng Wan
J. Mar. Sci. Eng. 2022, 10(8), 1007; https://doi.org/10.3390/jmse10081007 - 22 Jul 2022
Cited by 4 | Viewed by 1861
Abstract
The occurrence of a tip leakage vortex (TLV) is a special phenomenon of ducted propellers, which has a significant influence on the propeller’s hydrodynamic performance and efficiency. The inception, evolution, and instability of the TLV under different tip clearance sizes have a direct [...] Read more.
The occurrence of a tip leakage vortex (TLV) is a special phenomenon of ducted propellers, which has a significant influence on the propeller’s hydrodynamic performance and efficiency. The inception, evolution, and instability of the TLV under different tip clearance sizes have a direct impact on the cavitation and acoustic characteristics. A simulation was set up to calculate the open-water performance of a standard ducted propeller. The open-water characteristics (OWCs) were compared with the experimental data to verify the feasibility of the method. Furthermore, to capture the influence of tip clearance size on the vortex structure evolution and wake dynamics, the improved delayed detached eddy simulation (IDDES) method was adopted to simulate four groups of ducted propellers with different tip clearances. The results showed that with the increase in the gap-to-span ratio (GSR), KTD and η0 gradually decreased, while KQ and KTB increased, but a peak point existed. Moreover, the TLV became thicker, indicating damage to the energy recycling process. The fast Fourier transform (FFT) of several wake points showed pressure pulsations of the wake ranging from the blade-passing frequency to the shaft frequency, and the evolution process accelerated with the increase in the GSR. The power spectral density (PSD) analysis showed that the energy of the wake enhanced with the increase in the GSR. In particular, the vortex interactions could cause pulses in low-GSR conditions, which could intensify the excitation force of the propeller and also have a certain impact on the noise level. Full article
(This article belongs to the Special Issue Novel Numerical Methods for Complicated and Violent Flows)
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20 pages, 19352 KiB  
Article
Numerical Simulation of the Flow around NACA0018 Airfoil at High Incidences by Using RANS and DES Methods
by Haipeng Guo, Guangnian Li and Zaojian Zou
J. Mar. Sci. Eng. 2022, 10(7), 847; https://doi.org/10.3390/jmse10070847 - 22 Jun 2022
Cited by 1 | Viewed by 3124
Abstract
In this work, the flow around the NACA0018 airfoil with a wide range of attack angles was investigated based on the open-source computational fluid dynamics (CFD) platform OpenFOAM. Two numerical methods, Reynolds-averaged Navier–Stokes (RANS) and the detached eddy simulation (DES), were employed. Under [...] Read more.
In this work, the flow around the NACA0018 airfoil with a wide range of attack angles was investigated based on the open-source computational fluid dynamics (CFD) platform OpenFOAM. Two numerical methods, Reynolds-averaged Navier–Stokes (RANS) and the detached eddy simulation (DES), were employed. Under the premise of a grid convergence analysis, the computed lift and drag coefficients were validated by the available experimental data. The pressure distribution, the complex flow mechanisms of the airfoil under the attached flow regime, the mild separation flow regime, and the post-stall flow regime, combined with the shedding vortex structures, streamlines, and vorticity distributions, are discussed. From the numerical results, it can be seen that the DES computation presents a better accuracy in the prediction of the lift and drag coefficients, with a deviation less than 10% at the largest angle of attack. Meanwhile, it also presents remarkable improvements in capturing the local flow field details, such as the unsteady separated flow and the shedding vortex structures. Full article
(This article belongs to the Special Issue Novel Numerical Methods for Complicated and Violent Flows)
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17 pages, 1836 KiB  
Article
Design Wave Height Parameter Estimation Model Reflecting the Influence of Typhoon Time and Space
by Guilin Liu, Pengfei Xu, Yi Kou, Fang Wu, Yi Yang, Daniel Zhao and Zaijin You
J. Mar. Sci. Eng. 2021, 9(9), 950; https://doi.org/10.3390/jmse9090950 - 01 Sep 2021
Cited by 1 | Viewed by 2039
Abstract
Typhoon storm surge disasters are one of the main restrictive factors of sustainable development in coastal areas. They are one of several important tasks in disaster prevention and reduction in coastal areas and require reasonable and accurate calculations of wave height in typhoon-affected [...] Read more.
Typhoon storm surge disasters are one of the main restrictive factors of sustainable development in coastal areas. They are one of several important tasks in disaster prevention and reduction in coastal areas and require reasonable and accurate calculations of wave height in typhoon-affected sea areas to predict and resist typhoon storm surge disasters. In this paper, the design wave height estimation method based on the stochastic process and the principle of maximum entropy are theoretically advanced, and it can provide a new idea as well as a new method for the estimation of the return level for marine environmental elements under the influence of extreme weather. The model uses a family of random variables to reflect the influence of a typhoon on wave height at different times and then displays the statistical characteristics of wave height in time and space. At the same time, under the constraints of the given observations, the maximum uncertainty of the unobtainable data is maintained. The new model covers the compound extreme value distribution model that has been widely used and overcomes the subjective interference of the artificially selected distribution function—to a certain extent. Taking the typhoon wave height data of Naozhou Observatory as an example, this paper analyzes the probability of typhoon occurrence frequency at different times and the characteristics of typhoon intensity in different time periods. We then calculate the wave height return level and compare it with traditional calculation models. The calculation results show that the new model takes into account the time factor and the interaction between adjacent time periods. Furthermore, it reduces the subjective human interference, so the calculated results of the typhoon’s influence on wave height return level are more stable and accurate. Full article
(This article belongs to the Special Issue Novel Numerical Methods for Complicated and Violent Flows)
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20 pages, 5656 KiB  
Article
Comparative Study of Different Turbulence Models for Cavitational Flows around NACA0012 Hydrofoil
by Minsheng Zhao, Decheng Wan and Yangyang Gao
J. Mar. Sci. Eng. 2021, 9(7), 742; https://doi.org/10.3390/jmse9070742 - 05 Jul 2021
Cited by 8 | Viewed by 2707
Abstract
The present work focuses on the comparison of the numerical simulation of sheet/cloud cavitation with the Reynolds Average Navier-Stokes and Large Eddy Simulation(RANS and LES) methods around NACA0012 hydrofoil in water flow. Three kinds of turbulence models—SST k-ω, modified SST k-ω, and Smagorinsky’s [...] Read more.
The present work focuses on the comparison of the numerical simulation of sheet/cloud cavitation with the Reynolds Average Navier-Stokes and Large Eddy Simulation(RANS and LES) methods around NACA0012 hydrofoil in water flow. Three kinds of turbulence models—SST k-ω, modified SST k-ω, and Smagorinsky’s model—were used in this paper. The unstable sheet cavity and periodic shedding of the sheet/cloud cavitation were predicted, and the simulation results, namelycavitation shape, shedding frequency, and the lift and the drag coefficients of those three turbulence models, were analyzed and compared with each other. The numerical results above were basically in accordance with experimental ones. It was found that the modified SST k-ω and Smagorinsky turbulence models performed better in the aspects of cavitation shape, shedding frequency, and capturing the unsteady cavitation vortex cluster in the developing and shedding period of the cavitation at the cavitation number σ = 0.8. At a small angle of attack, the modified SST k-ω model was more accurate and practical than the other two models. However, at a large angle of attack, the Smagorinsky model of the LES method was able to give specific information in the cavitation flow field, which RANS method could not give. Further study showed that the vortex structure of the wing is the main cause of cavitation shedding. Full article
(This article belongs to the Special Issue Novel Numerical Methods for Complicated and Violent Flows)
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12 pages, 1375 KiB  
Article
Elevation Calculation of Bottom Deck Based on Stochastic Process and Compound Distribution
by Guilin Liu, Chi Nie, Yi Kou, Yi Yang, Daniel Zhao, Fang Wu and Pubing Yu
J. Mar. Sci. Eng. 2021, 9(7), 697; https://doi.org/10.3390/jmse9070697 - 25 Jun 2021
Cited by 1 | Viewed by 1556
Abstract
In the design of offshore platforms, the height of the bottom deck directly affects the safety and engineering cost of the entire platform. It is a very important scale parameter in platform planning. The American Petroleum Institute (API) specification shows that the key [...] Read more.
In the design of offshore platforms, the height of the bottom deck directly affects the safety and engineering cost of the entire platform. It is a very important scale parameter in platform planning. The American Petroleum Institute (API) specification shows that the key to determining the height of the bottom deck lies in the wave height and calculation of the return level of the water increase. Based on the perspective of stochastic processes, this paper constructs a new distribution function model for joint parameter estimation of the marine environment. The new model uses a family of random variables to show the statistical characteristics of design wave height and water increase in both time and space, with extreme value expanded EED-I type distribution used as marginal distribution. The new model performs statistical analysis on the measured hydrological data of the Naozhou Station during the flood period from 1990 to 2016. The Gumbel–Copula structure function is used as the connection function, and the compound distribution model of the wave height and the water increase is used to obtain the joint return level of the wave height and the water increase and through which the bottom deck height of the area is calculated. The results show that the stochastic compound distribution improves the issue of the high design value caused by simple superposition of univariate return levels. The EED-I type distribution still has good stability under the condition of less measured data. Thus, under the premise of ensuring the safety of the offshore platform, less measured data can still be used to calculate the height of the bottom deck more accurately. Full article
(This article belongs to the Special Issue Novel Numerical Methods for Complicated and Violent Flows)
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20 pages, 2073 KiB  
Article
A Eulerian–Lagrangian Coupled Method for the Simulation of Submerged Granular Column Collapse
by Chun Wang, Guanlin Ye, Xiannan Meng, Yongqi Wang and Chong Peng
J. Mar. Sci. Eng. 2021, 9(6), 617; https://doi.org/10.3390/jmse9060617 - 03 Jun 2021
Cited by 3 | Viewed by 2464
Abstract
A two-fluid Eulerian–Lagrangian coupled model is developed to investigate the complex interactions between solid particles and the ambient water during the process of submerged granular column collapse. In this model, the water phase is considered to be a Newtonian fluid, whereas the granular [...] Read more.
A two-fluid Eulerian–Lagrangian coupled model is developed to investigate the complex interactions between solid particles and the ambient water during the process of submerged granular column collapse. In this model, the water phase is considered to be a Newtonian fluid, whereas the granular column is modeled as an elastic–perfectly plastic material. The water flow field is calculated by the mesh-based Eulerian Finite Volume Method (FVM), with the free surface captured by the Volume-of-Fluid (VOF) technique. The large deformation of the granular material is simulated by the mesh-free, particle-based Lagrangian Smoothed Particle Hydrodynamics method (SPH). Information transfer between Eulerian nodes and Lagrangian particles is performed by the aid of the SPH interpolation function. Both dry and submerged granular column collapses are simulated with the proposed model. Experiments of the submerged cases are also conducted for comparison. Effects of dilatancy (compaction) of initially dense (loose) packing granular columns on the mixture dynamics are investigated to reveal the mechanisms of different flow regimes. Pore water pressure field and granular velocity field are in good agreement between our numerical results and experimental observations, which demonstrates the capability of the proposed Eulerian–Lagrangian coupled method in dealing with complex submerged water–granular mixture flows. Full article
(This article belongs to the Special Issue Novel Numerical Methods for Complicated and Violent Flows)
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20 pages, 12608 KiB  
Article
Maneuverability and Hydrodynamics of a Tethered Underwater Robot Based on Mixing Grid Technique
by Jiaming Wu, Shunyuan Xu, Hua Liao, Chenghua Ma, Xianyuan Yang, Haotian Wang, Tian Zhang and Xiangxi Han
J. Mar. Sci. Eng. 2021, 9(6), 561; https://doi.org/10.3390/jmse9060561 - 22 May 2021
Cited by 2 | Viewed by 1754
Abstract
The maneuverability and hydrodynamic performance of the tethered underwater robot in a uniform flow field is investigated. In this research, a tethered underwater robot symmetrically installed with NACA66 hydrofoils and Ka 4-70/19A ducted propellers around its main body is first constructed. The method [...] Read more.
The maneuverability and hydrodynamic performance of the tethered underwater robot in a uniform flow field is investigated. In this research, a tethered underwater robot symmetrically installed with NACA66 hydrofoils and Ka 4-70/19A ducted propellers around its main body is first constructed. The method of overlapping grid combined with sliding mesh is applied in the numerical simulations, and the principle of relative motion is adopted to describe the hydrodynamic responses of the tethered underwater robot during the robot manipulation. The reliability of the CFD methods applied in this research is verified by experimental results, and the comparison between numerical and experimental ones shows that there is very little difference being found. The numerical results indicate that computational cost due to the research’s large-scale domain can be effectively reduced by the adopted numerical methods, hydrofoils’ control effect is greatly influenced by the towing speeds, and thrusts issued from the ducted propellers are related to the tethered underwater robot’s position and towing speed. Full article
(This article belongs to the Special Issue Novel Numerical Methods for Complicated and Violent Flows)
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25 pages, 8409 KiB  
Article
Higher-Harmonic Response of a Slender Monopile to Fully Nonlinear Focused Wave Groups
by Jiawang Liu and Bin Teng
J. Mar. Sci. Eng. 2021, 9(3), 286; https://doi.org/10.3390/jmse9030286 - 05 Mar 2021
Cited by 1 | Viewed by 1483
Abstract
The “ringing” response of a monopile foundation to focused wave groups was investigated in this study. Such responses are of practical interest in the context of offshore wind turbine foundations. Moderately steep transient focused wave groups were generated in a novel numerical wave [...] Read more.
The “ringing” response of a monopile foundation to focused wave groups was investigated in this study. Such responses are of practical interest in the context of offshore wind turbine foundations. Moderately steep transient focused wave groups were generated in a novel numerical wave tank, based on the high-order spectral method, which was verified and in good agreement with published laboratory data. The monopile was simplified into a slender linear elastic cantilever beam to measure the severity of the structural response. The resonant behavior was excited at the triple-wave frequency of the wave loads. The influence of the damping ratio on the ringing response was considered. Different incident wave models and hydrodynamic models were used to predict the wave loads and induced responses over different wave steepness. The wavelet transform was successfully applied to reveal the local characteristics of the wave loads and ringing response. Full article
(This article belongs to the Special Issue Novel Numerical Methods for Complicated and Violent Flows)
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Review

Jump to: Research

32 pages, 6575 KiB  
Review
A Review of High-Fidelity Computational Fluid Dynamics for Floating Offshore Wind Turbines
by Shun Xu, Yingjie Xue, Weiwen Zhao and Decheng Wan
J. Mar. Sci. Eng. 2022, 10(10), 1357; https://doi.org/10.3390/jmse10101357 - 22 Sep 2022
Cited by 6 | Viewed by 2765
Abstract
The design and development of floating offshore wind turbines (FOWTs) is an attractive issue in the wind energy harvesting field. In this study, the research related to the high-fidelity computational fluid dynamic simulations of FOWTs is comprehensively summarized and analyzed. Specifically, the component-level [...] Read more.
The design and development of floating offshore wind turbines (FOWTs) is an attractive issue in the wind energy harvesting field. In this study, the research related to the high-fidelity computational fluid dynamic simulations of FOWTs is comprehensively summarized and analyzed. Specifically, the component-level studies including aerodynamics, aeroelasticity and hydrodynamics are presented. The system studies with increasing complexity are performed, such as the simplified aerodynamics, prescribed platform motions and fully coupled aero-hydrodynamics, as well as a little knowledge relevant to the aero-hydro-elastic behaviors. This study emphasizes that some efforts should shift to the research on strongly coupled aero-hydro-elastic performance of FOWTs with the increasing rotor diameter. Moreover, further investigations of more realistic atmospheric inflows and strong interactions between multi-FOWTs are required. This study aims to introduce the hotspots of high-fidelity simulations of FOWTs to novel researchers, as well as to provide some suggested solutions. Full article
(This article belongs to the Special Issue Novel Numerical Methods for Complicated and Violent Flows)
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